Heh writing the application was part of the fun! :D No, really, I think that at least in Beehive, it is an important step: It ensures a minimum understanding of the environment of the instance and its mission, and as long as the option to join other instances is there, why not?
Synthclair
Is it possible to have a list of de-federated instances from Beehive? I think it may be good for transparency, even if I am pretty satisfied about how things are being done here!
I found some interesting and popular communities here: https://browse.feddit.de/ In my instance (Beehaw) There is also a list of communities that you can follow: https://beehaw.org/communities
If it is a community-driven decision, up to them of course - some small communities I used to follow that are not very much connected to the rest of reddit itself have no mentions about the blackout, and I suspect most of their members are not even aware of it. If it is the moderators deciding themselves, that is a different issue - it is very interesting to follow the list of open and private subreddits in reddark!
The posts and communities are frozen from the time the defederation took place onwards - only a "local" Beehaw copy remains.